Hi all, I use Efudex in small lesions as I find them. If it’s just a spot in my back, how do I keep it from rubbing off on my clothes? I’m afraid if I just apply the medicine and put my clothes on, the cream will rub off and won’t work. My husband told me to cover with a bandaid for a little bit and then remove the bandaid. But how long is a little bit? Thank you all!